QUOTE (fireryone @ Nov 20 2009, 01:19 PM)

Glarys has a higher chance of false positives than ccleaner.
While it may find more invalid entries it may also incorrectly identify valid entries.
Where as the above users have said, CCleaner takes a safer approach, with few false positives reported on the forums.
They have a back up option for the temps cleanning in case that something goes wrong.